Date of Award
8-2024
Degree Type
Dissertation
Degree Name
Doctor of Philosophy (PhD)
School
Psychology
Committee Chair
Dr. Alen Hajnal
Committee Chair School
Psychology
Committee Member 2
Dr. Nuno Oliviera
Committee Member 2 School
Kinesiology and Nutrition
Committee Member 3
Dr. Aaron Fath
Committee Member 3 School
Psychology
Committee Member 4
Dr. Jonathan Doyon
Committee Member 4 School
Psychology
Abstract
Humans can reliably perceive whether a slanted ground surface can be stood on or not. In the present study we investigated how differences in ambient lighting conditions affected the perception of stand-on-ability. The study manipulated lighting conditions (photopic, mesopic, scotopic) under which participants made affordance judgements about the stand -on-ability of a presented ramp in a virtual reality environment. We hypothesized that less visual information would be available in the scotopic condition, which would result in changes to affordance boundaries and movement complexity, when measured from head sway and center of pressure. Results indicated that participants’ affordance judgements were more conservative in low lighting and that movement complexity decreased at the affordance boundary. In addition, we showed that affordance responses can be predicted by movement complexity. The study demonstrated that exploratory activity exhibited through postural adjustments of the body generates information that specifies affordance perception.
Copyright
2024, Tyler Overstreet
Recommended Citation
Overstreet, Tyler, "The Effects of Ambient Light Intensity on Affordance Perception" (2024). Dissertations. 2266.
https://aquila.usm.edu/dissertations/2266